Process of making soluble mixed low and high fatty acid esters of cellulose



Patented Dec. 6, 1927.

UNITED sures I ran. nnnrnon, or Lyon, rnancn, nssrenon are sum 1):: er savonnnnm nn LYON, or LYON, rmcn.

PATENT OFFICE.

raocnss came sonunnn man now nun men rarer! non) nsrnns or No Drawing. Original application filed February 12, 1924, Serial No. 682,440, and in France In] 81, 1988. Divided and this application filed Kay 8, 1825. Serial Io. 28,900.

This is a division of my co-pendin patent application Serial No. 692,440, filed ebruary 12, 1924, in which I have described a process for obtaining mixed soluble cellulosic esters 5 consisting in heating mineral acid celluloseesters together with chlorides of the higher fatty acids in the presence of pyridine and benzene.

The present invention consists in a modilofication of the process wherein instead of mineral acid cellulose esters, organic acid cellulose esters, other than higher fatty acid esters, are treated.

The following is an example of the process:

100 grams ofdiaceto-cellulose is dissolved in 200 grams of pyridine and a solution of 320 grams of chloride of lauryle in 300 grams of toluene is added. The mixture is heated for half an hour to an hour to a temperature W of -45 C.

The past mass obtained is precipitated by alcohol an then purified by redissolving in benzene and re-precipitation of ,the benzenic 25 solution by alcohol.

The output is 80%. The laurodia'cetocellulose is produced in the form of filaments and is soluble in hydrocarbons of the aromatic series similarly to the mixed cellu- 80 losic esters of the higher fatty acids describedin my aforesaid application Serial No. 692, 440; the co to traction is however What I claim as my invention and desire to secure by States is z-- 4 1. A process for manufacturing mixed cellulose esters soluble in hydrocarbons of the aromatic series consisting in heating low Letters Patent of the United organic acid cellulose esters, other than hi her fatty acid esters, to ther with chlori es of the higher fatty aci of pyridine and benzenic hydrocarbons precipitating the mass at the end of the reaction by alcohol and purifying the product obtained.

' 2. Process for manufacturing mixed cellulose esters soluble in hydrocarbons of the aromatic series consisting in dimolving diacetocellulose in pyridine adding a solution of chloride of lauryl in toluene,- heating the mixture, precipitating the mass at theend of the reactlon by alcohol, purifying the product by redissolving in benzene and recipitating thebenzene solution by alcoho In witness whereof I have signed this specification.

PAUL BERTHON.

in the presence 

